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The diameter of a circle is the length of a straight line from a point on the edge of the circle passing through the center of the circle and onto a point on the opposite edge of the circle.
The radius of a circle is the length of a straight line from the center of a circle to a point on the edge of the edge of the circle.
So the radius of a circle is half its diameter, in this case 8cm.
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Earn +20 ptsQ: Diameter of a circle is 16cm what is the radius?
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Continue Learning about Geometry
If the radius of a circle is 2cm what is the diameter?
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